Author: Stuart Cracraft
Date: 15:07:45 01/14/98
Go up one level in this thread
On January 14, 1998 at 16:53:06, Vincent Lejeune wrote:
>I've red a book chess problem, and find the following position :
>
>[Event "?"]
>[Site "?"]
>[Date "??.??.????"]
>[Round "?"]
>[White "W"]
>[Black "B"]
>[Result "*"]
>[WhiteElo "?"]
>[BlackElo "?"]
>[FEN "8/7p/6pP/k4pP1/b1p1pP2/KpPpP3/1P1P4/7Q w - - 0 1"]
>
>
>and the book say :
>
>If it's white to moves, black are in zugzwang because after :
>1.Qd1 B moves 2.Qxc3 cxb3 3.Kxd3 , the 2 passed pawn win for white !!!
>I don't understand everything in the position (and I don't blame who
>don't understand like me ;) ).
>
>I look for someone who can analyse this position with a strong chess
>program...
>
Well, don't know about the "strong", but here's my program's analysis.
K2 1/13/98 0.19
Type ? for help.
Transposition table: Entries=100K Size=6400K
Pawn transposition table: Entries=31K Size=2000K
? set time 60
? test solve ../tests/testone.ci
60 seconds per problem.
lejeune
Qd1
white
. . . . . . . .
. . . . . . . p
. . . . . . p P
k . . . . p P .
b . p . p P . .
K p P p P . . .
. P . P . . . .
. . . . . . . Q
Phase = Middlegame, Target search time = 60 sec, Root score = 442
1+ 0.0 697 3 Qh4
1. 0.0 603 17 Qh4
2- 0.1 431 56 Qh4
2& 0.1 426 64 Qh4 Kb5
2& 0.1 427 78 Qc1 Kb5
2. 0.1 431 86 Qd1 Kb5
3+ 0.1 697 161 Qd1
3. 0.1 603 202 Qd1 Kb5 Qa1
4- 0.1 446 266 Qd1
4. 0.1 446 311 Qd1 Kb5 Qe1 Ka5
5+ 0.1 697 531 Qd1
5. 0.1 603 706 Qd1 Kb5 Qe1 Ka5 Qa1 Kb5
6- 0.1 431 915 Qd1
6& 0.1 430 1160 Qd1 Kb5 Qe1 Ka5 Qf1 Kb5
6. 0.1 430 1414 Qd1 Kb5 Qe1 Ka5 Qf1 Kb5 Qa1 Ka5 Qe1 Kb5
Qa1
7& 0.2 430 1699 Qd1 Kb5 Qe1 Ka5 Qf1 Kb5 Qa1 Ka5 Qe1 Kb5
Qa1
7. 0.2 430 1942 Qd1 Kb5 Qe1 Ka5 Qf1 Kb5 Qa1 Ka5 Qe1 Kb5
Qa1
8& 0.2 434 2571 Qd1 Kb5 Qe1 Ka5 Qf1 Kb5 Qa1 Ka5 Qf1
8. 0.2 434 2884 Qd1 Kb5 Qe1 Ka5 Qf1 Kb5 Qa1 Ka5 Qf1
9& 0.2 434 3271 Qd1 Kb5 Qe1 Ka5 Qf1 Kb5 Qa1 Ka5 Qf1
9. 0.2 434 3688 Qd1 Kb5 Qe1 Ka5 Qf1 Kb5 Qa1 Ka5 Qf1
10& 0.3 430 4817 Qd1 Kb5 Qe1 Ka5 Qf1 Kb5 Qa1 Ka5 Qe1 Kb5
Qa1
10. 0.4 430 11420 Qd1 Kb5 Qe1 Ka5 Qf1 Kb5 Qa1 Ka5 Qe1 Kb5
Qa1
11+ 0.9 507 27335 Qd1
11. 1.0 503 30122 Qd1 Kb5 Qf1 Ka5 Qh1 Kb5 Qa1 Ka5 Qh1
12- 2.2 427 70920 Qd1
12& 2.3 425 72688 Qd1 Bb5 Qa1 Ba6 Qf1 Kb5 Qe1 Ka5 Qa1 Kb5
Qb1
Ka5 Qa1
12. 2.3 425 72756 Qd1 Bb5 Qa1 Ba6 Qf1 Kb5 Qe1 Ka5 Qa1 Kb5
Qb1
Ka5 Qa1
13& 2.8 430 92382 Qd1 Bb5 Qa1 Be8 Qe1 Ba4 Qf1 Bb5 Qe1 Be8
Qa1
Bd7 Qe1 Bb5 Qa1
13. 2.9 430 98266 Qd1 Bb5 Qa1 Be8 Qe1 Ba4 Qf1 Bb5 Qe1 Be8
Qa1
Bd7 Qe1 Bb5 Qa1
14& 3.4 430 116144 Qd1 Bb5 Qa1 Be8 Qe1 Bb5 Qf1 Be8 Qa1 Bd7
Qe1
Bb5 Qf1 Be8 Qa1 Bd7 Qe1 Bb5
14. 6.6 430 214074 Qd1 Bb5 Qa1 Be8 Qe1 Bb5 Qf1 Be8 Qa1 Bd7
Qe1
Bb5 Qf1 Be8 Qa1 Bd7 Qe1 Bb5
15& 8.2 430 277129 Qd1 Bb5 Qa1 Be8 Qe1 Bb5 Qf1 Be8 Qa1 Bd7
Qe1
Bb5 Qf1 Be8 Qa1 Bd7 Qe1 Be8 Qa1
15. 19.7 430 710557 Qd1 Bb5 Qa1 Be8 Qe1 Bb5 Qf1 Be8 Qa1 Bd7
Qe1
Bb5 Qf1 Be8 Qa1 Bd7 Qe1 Be8 Qa1
16& 23.8 430 855943 Qd1 Bb5 Qa1 Ba4 Qh1 Be8 Qf1 Bd7 Qe1 Be8
Qb1
Bb5 Qa1 Ba4 Qh1
16. 41.3 430 1430961 Qd1 Bb5 Qa1 Ba4 Qh1 Be8 Qf1 Bd7 Qe1 Be8
Qb1
Bb5 Qa1 Ba4 Qh1 Bb5 Qa1
17& 49.1 430 1722280 Qd1 Bd7 Qa1 Ba4 Qb1 Bb5 Qe1 Bd7 Qa1 Ba4
Qb1
Bb5
17. 54.6 430 1930188 Qd1 Bd7 Qa1 Ba4 Qb1 Bb5 Qe1 Bd7 Qa1 Ba4
Qb1
Bb5 Qa1 Be8 Qb1 Bb5
18. 60.0 430 2144013 Qd1 Bd7 Qa1 Ba4 Qb1 Bb5 Qe1 Bd7 Qa1 Ba4
Qb1
Bb5 Qa1 Be8 Qb1 Bb5
My move is : Qd1
Time = 60.0 Rate=35730 Nodes=[1536201/607812/2144013]
Eval=431520 RptCnt=11112 NullCut=100569
Extensions: Check=151557 Recapture=15205 Pawn=135 OneMove=0
Threat=0 DeepSearch=0 Mate=0
Material=[1600/1000] Worst=[-1080/97]
Hash: Success=26% Collision=66%
Hash Counts: ReadHits=446157, ReadProbes=1658921, WriteColl=326019,
WriteTries=493572
Pawn Hash: Success=98% Collision=12%
Pawn Counts: ReadHits=853541, ReadProbes=862338, WriteColl=1095,
WriteTries=8797
black
. . . . . . . .
. . . . . . . p
. . . . . . p P
k . . . . p P .
b . p . p P . .
K p P p P . . .
. P . P . . . .
. . . Q . . . .
+++ Qd1 Qd1
Correct so far: 1 Total problems: 1 Percent: 100%
********* Grand totals **********
Time = 60.0 Rate=35730 Nodes=[1536201/607812/2144013]
EvalCnt=431520 RptCnt=11112 NullCut=100569
Extensions: Check=151557 Recapture=15205 Pawn=135 OneMove=0
Threat=0 DeepSearch=0 Mate=0
Hash: Success=26% Collision=66%
Pawn Hash: Success=98% Collision=12%
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